Appliance for use with metallurgical or chemical vessels.



No. 728,122. PATENTEDMAYIZ,1903.-

W. LYNES.

APPLIANCE FOR USE WITH METALLURGICAL 0R CHEMICAL VESSELS.

APPLICATION FILED DBO. s. 1902.

3 SHEETS-SHEET 1.

30 MODEL WITNESSES INV ENTOR ll/z/llzafizg itgj m: Norms PErzns co wu'rc-ul'nov. WMHINGTON. n. cy

No. 728,122. PATENTED MAY 12, 1903. v

, W. LYNES.

APPLIANCE FOR USE WITH METALLURGICAL 0R GHEMIGALVESSELS;

APPLICATION FILED M10. 6. 1902.

no MODEL. I s SHEETS-SHEET 2.

No. 728.122. i PATBNTED MAY 12,1903.

W. LYNES.

APPLIANCE FOR WITH METALLURGICAL OR CHEMICAL VESSELS.

' V APPLICATION FILED p20. 6. 1902. no MODEL. a snnn'rs-snnnw a.

r I b a? WITNESSES INVENTIOR wollawizfiylw m5 "cams PETERS 0.. mow-Una. wnsmxmou. a. c.

'NIT D 'TATES Patented May 12, 1903.

APPLIANCE FOR USE WITH METALLURGICAL 0R CHEMICAL VESSELS.

SPECIFICATION formingpart of Letters Patent No. 728,122, dated May 12, 1903. Application filed December 6 1902 Serial No. 134,196. (No model.)

To all whom it may concern:

Be it known thatI, WILLIAM LYNES, brassfounder, a subject of the King of Great Britain, residing at 557 Stratford road, Sparkhill, near Birmingham, England, have invented certain new and useful Appliances for Use in outlet before they can escape into the shop or apartment in which the operation is being conducted, such attachments being so ar-.

ranged as not to interfere with the handling or manipulation of the vessels in pouring the molten metal and performing'analogous operations,and in combination with them means are provided for facilitating the skimmingof the molten metal or other contents of the pot and inspecting the said molten metal or the. like when the fume-extractor is in position.

Figure 1 of the accompanying drawings.

represents in elevation my fume-extraction appliance and the accessories used in connection therewith, showing the same applied to an ordinary crucible such as is used in the melting and casting of brass in brass-foundries and in other analogous metallurgical operations in which the molten metal contained in the pot evolves or is liable to evolve. deleterious fumes on being removed from the melting-furnace and brought into contact with cold air. Fig. 2 is a vertical section of the said pot and the appliances attached thereto. Fig. 3 represents'a horizontal section of Fig. 2 upon the dotted line or, showing the body part of the fume-extractor in plan. Fig. at shows, upon a reduced scale, the pot, with fume-extractor attached, in the act of being tilted for pouring the molten metal contained therein. Fig. 5 is a perspective view of a brass-foundry or like shop fitted with fume-extracting appliances and showing such appliances in use in connection with brass-casting pots.

.The same letters of reference indicate corresponding parts in the several figures of the drawings.

The appliance to be used in connection with melting or casting pots in the manner represented for the. purpose of exhausting, extracting, or abstracting and carrying off the fumes evolved from the molten metal when the pot is removed from the meltingfurnace consists of a detachable and portable hood or bonnet a, made of iron or steel and covered, if necessary, with asbestos or like heat-resisting material (or the said hood may be made of, fire-clay or other refractory material) and adapted tobe applied to the mouth of the potor crucible: Leading from the crown or the back of the crown of the said hood .is a neck or outlet b, which may either be ;made as a fixture to the hood, as in the arrangement shown, or may have a swiveling movement, or it may be made to constitute the socket part of a ball-and-socket joint, and to this said neck a flexible pipe or tube 0 or otherflexible conductor to provide for carrying off the abstracted fumes (but Without interfering with the'manipulation of the pot) is connected by a clamp or clip a or by bindingwires or in; any"other convenient manner, or they socket'may be made in suitably-articulated sections or short tubular lengths, whereby it is made flexible. The

flexible shaft or conductor is arranged to lead directly or indirectly into a stack, chimney, i or-other uptake,which may or may not be provided with a fan for inducing a draft, or it may beconnected with an exhauster of any suitable type.

The fume abstracting or exhausting hood is adapted to be applied, assh'own, to the mouth of the crucible d or to the, open top of a casting, melting, or mixing pot or other vessel used in metallurgical operations, and for this purpose the lower edge has a'fiange a,

which rests on the top edge of the said pot and is provided with a skirting or with a se; ries of depending ears or clips a adapted to socket onto and embrace the walls of the upper part of the said pot, as clearly set forth in Figs. 1 and 2. This flanged part of the hood when resting on the top edge of the pot also constitutes an abutment against which studs or projectings lugs hon theinner sides of the arms, grips, or jaws of the crucibletongs may come and take a bearing when the pot is laid hold of by the said tongs for transportation from the furnace to the mold or from one mold to another, and the jaws of the said tongs may also be arranged to embrace and grip the hanging ears or clips. These means for holding down or retaining the hood in position over the mouth of the pot during the transportation ofthe pot or the pouring of the molten metal are shown in Fig. 4, or instead of holding down the hood through the medium of the crucible-tongs in either of the manners as above described the skirting which hangs from the rest-flange of the hood may be split or made flexible, so that it will either grip the mouth of the pot automatically or else admit of the skirting when gripped by the tongs being closed or gathered. in around the outside walls of the pot and again expanding, so as to be freed from the said pot when thegrip of the tong-jaws is relieved. The material of the hood and skirting is cut away at the top and front, so as to leave a gap or clearance at a corresponding when the hood is in position to the pouring-lip d of the pot, and the gap thus made serves as a pouring and sight hole, which is more or less covered by a hinged lid or flap 6, connected, preferably, by stiff hinge-joints eto the roof or crown of the said hood in such a manner that the said lid may be adjusted to and fixed at any angle or in any desired position relative to the sight-hole, so as to leave more or less clearance for viewing the metal in the pot. This cover may be made of metal or of mica, wire-gauze, or other transparent or semitransparent refractory material, and when set at a certain angle relative to the gap it may also serve as a baffle or means for deflecting or preventing the escape of flame or fumes from the inside of the pot and hood.

Before a pot containing molten brass or other metal is removed from the melting-furnace a temporary iron, plumbago, or like cover is applied to the mouth thereof pend ing the application of the detachable fumeextractor thereto, and, if necessary, the said pot may be temporarily supported in a stand, frame, or cradle, which prevents the foot being pulled over by the swinging of the flexible pipe or fume-conveyer while the hood is being applied to the month of the pot after the removal of the cover or stopper there from. 1

In connection with the fume-extraction attachment to the pot I propose to employ a detachable pan or vesself, which is adapted to receive the skimmings or scum which is scraped from the surface of the metal prior to pouring. This pan is adapted to be hung by hooks f or otherwise from the edge of the pot or from the hood itself immediately in front of the pouring-lip and also in front of the pouring and sight hole in the hood in such a manner that the mouth of the same comes in the same level as or a little below the said pouring-lip of the pot. This pan or attachment forms a convenient removable receptacle for the scum or skimmings, which are removed by a rake or other tool from the surface of the molten metal prior to pouring, and it preferably has a concaved or curved inner side f which conforms to the contour of and seats against the front of the pot. Further, the open top is provided with an overhanging metal shield g,'preferably formed of wire-gauze or perforated metal, attached to one side or both sides and adapted to provide a means for deflecting the fumes arising from the skim mings backinto the hood without interfering wit-h the inspection of the contents of the pot by the workmen during the skimming operation. The said shield is so formed or disposed as to leave a gap or opening at g for the insertion of the skimming-tool.

The flexibility of the pipe or tube 0 admits of the ready transportation or manipulation of the attachment or exhauster in applying the latter to the pot or vessel and also permits the pot, with the attached hood, to be freely inclined or tilted for pouring out the molten metal or other contents of the pot and for other purposes, as may be necessary in the performance of casting or other operations. Further, by means of these flexible branch connections a number of hoods or exhausting-covers may be attached 01 coupled to single main outlet-pipe fixed or hung in any convenient manner and running into a chimney or uptake-shaft, as shown in the perspective view Fig. 5, and thus the whole of the covers or eXhausters in use in a shop or foundry may he connected to a common outlet.

A further advantage attendant on the use of the appliances herein described is that the fumes or vapors exhausted from the vessels in certain operations will be condensed and collected in the branch and main outlet-pipes, from which they may be readily collected when sufflcient quantities have accumulated, and in this manner commercially valuable substances-such, for-instance, as practically pure oxid of zinc in the case of brass-founding-may be easily obtained and utilized as desired.

The exhausting hood or cover and its accessories, as above described, may be adapted for use in connection with portable vessels used in various metallurgical operations other than melting and pouring and also in pouring, decanting, mixing, and otherwise dealing with acids, alkalies, and other chemicals from which poisonous, deleterious, and other obnoxious fumes are evolved.

Having fully described my invention, what Idesire to claim and secure by Letters Patent is- 1. An appliance for exhausting or extracting and carrying away fumes and vapors from crucibles or other vessels,consisting of a hood, cap or cover adapted to be applied to the mouth of the crucible and provided with an inspection and pouring gap and with an outlet, and means for connecting the outlet with a suitable offtake.

2. A portable appliance for exhausting or extracting and carrying away fumes or vapors from crucibles or the like, consisting of a hood, cap or cover having an inspection and pouring gap, means for holding the device upon the mouth of the vessel, an outlet projecting upward from the hood, and a flexible tube connecting the outlet with a suitable olftake.

3. A portable and detachable'fume extracting or exhausting hood cap, or cover adapted to be applied to the mouth of the crucible or other vessel, a flexible conduit connecting the vessel with a suitable offtake and the hood or cover having a gap for inspecting or pouring the contents of the vessel, and a hinged or adjustable lid or baflie disposed over the gap.

4t. Aportable and detachable fume extracting or exhausting hood, cap or cover for crucibles and the like, having a flange or skirt ing adapted to rest upon the edges of the mouth of the top of the vessel and having depending ears or clips to embrace the walls of the vessel and to present a means to be engaged by the implement employed in handling v my hand in presence of two subscribing witnesses.

WILLIAM LYNES.

Witnesses:

HENRY L. KERRELL, WALTER GILL. 

